drm_pagemap..._set_pagemap(9)

💫 NAME 💫

drm_pagemap_cache_set_pagemap — bestie, this is the one that assigns a drm_pagemap to a drm_pagemap_cache ✨

(also hi, this is the section 9 kernel API manual, we're in the deep lore today 🫶)

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🌸 SYNOPSIS 🌸

void drm_pagemap_cache_set_pagemap(struct drm_pagemap_cache *cache,
                                   struct drm_pagemap *dpagemap);

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🎀 ARGUMENTS 🎀

• cache — the drm_pagemap_cache you're assigning the drm_pagemap to 💅
• dpagemap — the drm_pagemap you're assigning, periodt.

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🦋 DESCRIPTION 🦋

okay so listen 👀 — you call this function to populate a drm_pagemap_cache, and there is exactly one correct moment to do it: only after a call to drm_pagemap_get_from_cache has returned NULL. That's the vibe check, that's the window, that's your moment ✨

no cap, the ordering is the whole bit — get the NULL from drm_pagemap_get_from_cache first, then populate with this one 🙈

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🌈 SEE ALSO 🌈

the whole friend group, lowkey iconic:

• kernel file ./drivers/gpu/drm/drm_pagemap_util.c 📁
• struct drm_pagemap_cache(9)
• struct drm_pagemap_shrinker(9)
• drm_pagemap_cache_create_devm(9)
• Cache lookup(9)
• drm_pagemap_cache_lock_lookup(9)
• drm_pagemap_cache_unlock_lookup(9)
• drm_pagemap_get_from_cache(9)
• drm_pagemap_get_from_cache_if_active(9)
• drm_pagemap_shrinker_might_lock(9)
• drm_pagemap_shrinker_add(9)
• drm_pagemap_shrinker_create_devm(9)
• struct drm_pagemap_owner(9)
• drm_pagemap_release_owner(9)
• interconnect_fn(9)
• drm_pagemap_acquire_owner(9)

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💖 that's the whole page bestie, go populate some caches responsibly. shoutout to ./drivers/gpu/drm for housing this masterpiece, dated October 2026, filed under drm_pagemap..._set_pagemap(9) — ily, mwah 😭👑